40 CFR 86.530-78 - Test sequence, general requirements.
(a) Ambient temperature levels encountered by the test vehicle throughout the test sequence shall not be less than 20 °C (68 °F) nor more than 30 °C (86 °F). The vehicle shall be approximately level during the emission test to prevent abnormal fuel distribution.
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.